diff --git a/integration.md b/integration.md
index ac83d1a..20b44ee 100644
--- a/integration.md
+++ b/integration.md
@@ -152,11 +152,11 @@ Another example is $W(x)=e^{-x}$ with integration limits $0$ to $\infty$. In thi
 
 ```{admonition} Exercise: Average velocity of the Maxwell-Boltzmann distribution.
 
-Use Simpson's rule, Gaussian quadrature, and the general purpose integrator [`scipy.integrate.quad`](https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.quad.html) to evaluate the average velocity $\langle\left|v\right|\rangle$ for the [Maxwell-Boltzmann distribution](https://en.wikipedia.org/wiki/Maxwell–Boltzmann_distribution).
+Use Simpson's rule, Gaussian quadrature, and the general purpose integrator [`scipy.integrate.quad`](https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.quad.html) to evaluate the average velocity $\langle\left|v\right|\rangle$ for the 3D [Maxwell-Boltzmann distribution](https://en.wikipedia.org/wiki/Maxwell–Boltzmann_distribution).
 
 For each method, check the numerical error comparing to the analytic result. How many points do you need to get to $0.1$% accuracy?
 
-For Simpson's rule you can use your own implementation from above or you could try [`scipy.integrate.simpson`](https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.simpson.html)).
+For Simpson's rule you can use your own implementation from above or you could try [`scipy.integrate.simpson`](https://docs.scipy.org/doc/scipy/reference/generated/scipy.integrate.simpson.html).
 
 For Gaussian quadrature, try both Gauss-Hermite and Gauss-Laguerre. Which one is best?
 ```